Chevy is GM. If indeed you have a Corvette with 700 hp, it has obviously been modified and it's quite possible your "chevy" can't or won't diagnose it. If it was stock, they should have the tools necessary on hand. Take it back to whoever did the engine mods and they might be able to help.Help I have a 2025C. A convertible l t one with seven hundred horsepower shows check engine light bank 2. 02 sensor. But chevy's telling me that they need a tool from g.M to help diagnose what's wrong with it